Solanum pinnatisectum
Solanum pinnatisectum, the tansy-leaf nightshade or tansyleaf nightshade, is a species of flowering plant in the family Solanaceae, native to Arizona in the United States, and to Mexico. A wild potato, it is being extensively studied for its resistance to Phytophthora infestans, in an effort to improve the domestic potato Solanum tuberosum.